CaltechAUTHORS
Published January 5, 2015 | Version public
Book Section - Chapter Metadata-only

Pulsed Laser Diode for Use as a Light Source for Short-Exposure, High-Frame-Rate Flow Visualization

Creators

Abstract

A pulsed laser diode (PLD) is demonstrated as a practical light source for high-speed digital schlieren and shearing-interferometric cinematogrpahy. Frame rates of greater than 300k fps with exposure times on the order of 10 ns have been achieved with an inexpensive and user-friendly setup. The light source has primarily been used in our laboratory to study nonsteady phenomena in high-speed gas flows. Examples are presented to illustrate the usefulness of the PLD as a light source with characteristics of a narrow band of wavelength, short exposure time, high frame-rate, and long pulse train duration.

Additional Information

© 2015 American Institute of Aeronautics and Astronautics. The authors would like to thank Bahram Valiferdowsi for help running T5. This work was an activity that was part of National Center for Hypersonic Laminar-Turbulent Research, sponsored by the Integrated Theoretical, Computational, and Experimental Studies for Transition Estimation and Control project, supported by the U.S. Air Force Office of Scientific Research and the National Aeronautics and Space Administration (FA9552-09-1-0341). Additionally, this work was supported in part of the Transition Delay in Hypervelocity Boundary Layers by Means of CO2/Acoustic Interactions project, sponsored by the Air Force Office of Scientific Research (FA9550-10-1-0491). J. Damazo was supported by an NDSEG Fellowship.

Additional details

Identifiers

Eprint ID
97965
DOI
10.2514/6.2015-0530
Resolver ID
CaltechAUTHORS:20190816-144340439

Related works

Describes
10.2514/6.2015-0530 (DOI)

Funding

Air Force Office of Scientific Research (AFOSR)
FA9552-09-1-0341
Air Force Office of Scientific Research (AFOSR)
FA9550-10-1-0491
National Defense Science and Engineering Graduate (NDSEG) Fellowship

Dates

Created
2019-08-22
Created from EPrint's datestamp field
Updated
2021-11-16
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
GALCIT
Other Numbering System Name
AIAA Paper
Other Numbering System Identifier
2015-0530